package com.thread.Demo02;

import java.text.SimpleDateFormat;
import java.util.Date;

//模拟倒计时
public class TestSleep2 {
    public static void main(String[] args) {
        tenDown();
        //打印当前时间
        Date startTime = new Date(System.currentTimeMillis());
        while (true){
            try {
                Thread.sleep(1000);
                System.out.println(new SimpleDateFormat("HH:mm:ss").format(startTime));
                startTime = new Date(System.currentTimeMillis());//更新当前系统时间
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

    }


    //模拟倒计时
    public static void tenDown(){
        int num =10;
        while (true){
            try {
                Thread.sleep(1000);
                System.out.println(num--);
                if (num<=0){
                    break;
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}

    